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Slow-Roll Dark Energy
- J. Richard Gott, III and Zachary Slepian
arXiv.org/abs/1011.2528
The Standard Picture
we are sitting at the bottom of a potential well
Slow-Roll Dark Energy J. Richard Gott, III and Zachary Slepian - - PowerPoint PPT Presentation
Slow-Roll Dark Energy J. Richard Gott, III and Zachary Slepian - - PowerPoint PPT Presentation
Slow-Roll Dark Energy J. Richard Gott, III and Zachary Slepian arXiv.org/abs/1011.2528 The Standard Picture V 0 we are sitting at the bottom of a potential well Linde: chaotic inflation scalar field slow-rolls down potential Predicts n s
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Linde: chaotic inflation
scalar field slow-rolls down potential Predicts ns=.967, r=.13
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WMAP cosmic microwave background
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WMAP
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WMAP – Gott-Colley color scheme
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WMAP & INFLATION
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Primordial tilt & tensor/scalar ratio
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Our Hypothesis
Dark energy is a second epoch of inflation just like the first
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D.E. Equation of State
DEFINE W = RATIO OF PRESSURE TO ENERGY DENSITY
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Chevallier-PoLarski-linder Parametrization
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W(a) = Wo + Wa(1 – a)
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w for a Scalar Field model
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Equation of motion
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slow roll formula for delta w
1) First term is small compared to second. 2) velocity is small so roughly constant and Hence also .
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Our potential
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N-flation
promoters: Dimopoulos et al. 2005, easther and mcallister 2006, kim and liddle 2006 n-field quintessence: kaloper and sorbo 2005, svrcek 2006
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cpl parametrization vs. our model
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slow-roll formula vs. numerical results
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References
Dark Energy as Double N-Flation--Observational Predictions, Gott and slepian, 2011, http://arxiv.org/abs/1011.2528 and references therein
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Slow Roll Formula
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